Saint Clair River Cruise is a 46.4 mile loop trail located near Port Huron, MI and is rated as moderate. The trail is primarily used for road biking and is accessible from April until October.
The potential for an awesome trail is there. We did this ride in August and saw them working on additional pieces of the bike path. Right now it's a combination of paths, roads and sidewalks which was somewhat confusing. I'm looking forward to seeing what it looks like after construction as this is a beautiful area. We had lunch down town and the Brewery and watched the the boats pass while sitting on the deck.